In this question use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.
A uniform steel girder AB AB\,AB has length 11 m and mass 18 kg. The girder is supported in a horizontal position by a single pivot at the point PPP, where AP=4AP = 4AP=4 m.
To maintain equilibrium, a ballast weight of W W\,W newtons is attached to the girder at the end AAA.
Find the value of WWW, giving your answer in terms of ggg.
State how the assumption that the girder is uniform has been used in your solution.